Story perspectives
Finland Unveils World's Largest Sand Battery for Energy Flexibility
8/28/2025
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Story summary
- Finland launched the world's largest sand battery, a 1 MW/100 MWh thermal storage system by Polar Night Energy.
- Operational since June, it has replaced an old woodchip plant and surpassed efficiency goals.
- Minister Sari Multala highlighted its importance for energy flexibility and emissions reduction.
- Polar Night Energy is considering additional large-scale thermal storage initiatives.
